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46

Brownout Event 46

Carrier · Heat Pumps

What does 46 mean?

The system has experienced a brownout event due to low line voltages. The unit will revert to a 5-minute cycle delay to protect components. This may indicate an issue with your power supply.

Common Causes

  • low line voltages

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If low line voltage conditions are persistent, contact your power provider (utility company) for assistance.

  2. 2

    Check for any other appliances or systems in your home that might be drawing excessive power.

  3. 3

    Monitor the power supply to ensure it is stable and within normal operating voltage range.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

1 (1 sec ON), longer pause (2 sec OFF)Amber LED flashes 1 time (1 sec ON) then longer pause (2 sec OFF) — Variable Capacity Range Cutback1, pauseAmber LED flashes 1 time then pauses — Variable Capacity Operation16Communication Loss Event 16
Source: Carrier Heat Pumps
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